EP 1757165 B1 20111228 - CODING REVERBERANT SOUND SIGNALS
Title (en)
CODING REVERBERANT SOUND SIGNALS
Title (de)
KODIERUNG VON TONSIGNALEN MIT HALL
Title (fr)
CODAGE DE SIGNAUX ACOUSTIQUES REVERBERES
Publication
Application
Priority
- IB 2005051820 W 20050603
- EP 04102582 A 20040608
- EP 05744006 A 20050603
Abstract (en)
[origin: US2008281602A1] The invention relates to an audio encoder and decoder and methods for audio encoding and decoding. In the encoder an audio signal is split into an anechoic signal part and information regarding a reverberant field associated with the audio signal, preferably by a representation using only few parameters such as reverberation time and reverberation amplitude. The anechoic signal is then encoded using an audio codec. At the decoder the anechoic signal part is restored using the audio codec, and the restored anechoic signal part is transformed into the substantially original audio signal by applying reverberance according to the information regarding the reverberant field, preferably by convolution with a room impulse response generated on the basis of the reverberant field information. According to the invention the audio codec involved needs only be capable of encoding anechoic audio signals, thus solving the problem of parametric audio codecs providing poor performance on reverberant audio signals.
IPC 8 full level
G10L 19/00 (2013.01); H04S 5/00 (2006.01)
CPC (source: EP KR US)
G10L 19/00 (2013.01 - EP KR US); G10L 21/02 (2013.01 - KR); H03M 7/30 (2013.01 - KR); H04S 5/00 (2013.01 - KR)
Citation (examination)
MASASHI UNOKI ET AL: "A speech dereverberation method based on the MTF concept", EUROSPEECH 2003, 1 September 2003 (2003-09-01), pages 1417 - 1420, XP007006944
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005122640 A1 20051222; AT E539431 T1 20120115; CN 104112450 A 20141022; CN 1965610 A 20070516; EP 1757165 A1 20070228; EP 1757165 B1 20111228; JP 2008503793 A 20080207; JP 5247148 B2 20130724; KR 101158717 B1 20120622; KR 20070034481 A 20070328; TW 200611242 A 20060401; US 2008281602 A1 20081113
DOCDB simple family (application)
IB 2005051820 W 20050603; AT 05744006 T 20050603; CN 200580018839 A 20050603; CN 201410351425 A 20050603; EP 05744006 A 20050603; JP 2007526639 A 20050603; KR 20067025693 A 20050603; TW 94118663 A 20050606; US 56977805 A 20050603